identification & assessment of adc part - iii human-wildlife conflicts - althoff lec-06
TRANSCRIPT
Identification & Assessment of ADCPart - III
HUMAN-WILDLIFE CONFLICTS - Althoff LEC-06
MAMMAL DAMAGE IDENTIFICATION
• Carnivores and other predators
• Feral Hogs
Badgers Bears Bobcat & LynxCoyotes Wolves DogsFoxes Hogs Mt. lionsOpossums Raccoons SkunksWeasels Mink Domestic cats
PREDATOR MAMMAL Damage - Overview
• Indirect Evidence:a) facts observed from carcass remains
b) blood on soil and vegetationc) predator tracks in vicinity of dead
animal d) carnivore scat/droppings e) carnivores
observed/known to be present in area f) disappearance of young or small livestock
g) unusual livestock behaviori) history of predation in the area
PREDATOR MAMMAL Damage - Overview
• Direct Evidence:a) predators observed pursuing/attacking animals
b) external physical injury and hemorrhagec) subcutaneous hemorrhage and
tooth marks d) damage to skin and other soft tissues e) carnivores observed/known to be present in area f) damage to skull and other bones
• #1 procedural step: skin the carcass!!!!
Calf or Limb: Alive or Dead – Predator or Scavenger?
• If born alive …and it stood for a while or longer, hooves of calves and lambs will lack the membrane covering the soles (aka hooves) and likely be worn some. Dirt on the hooves is positive evidence young as born alive. Milk in stomach indicates it was alive (i.e., nursed). Lungs will be light colored vs. dark scarlet colored if stillborn.
• If stillborn …no dirt on hooves, membrane covering soles still completely present. Lungs dark scarlet colored
21/4-3”
4”
wolf
red fox large dog
coyote
2”
TRACKID Keys….
• Front or hind foot track?
• Width/length of track?
• Spread ?• Toe pad shape?• Heal pad shape?• Claw marks
present?
>4”
Length measurements shown for “typical”adult-sized individuals
21/4-3”
wolf
TRACKID challenges
• Front vs. back• Heel pad
“variation”
Coyote
Left front Left hind
vs.
wolf
Coyote
Left front Left hind
vs.
Right front Right hind
Mt. Lion
Source: OH Div. of Wildlife
F = front footH = hind foot
Guide to MAMMAL TRACKS
1 1/2” – 2 1/4”
Coyote
Typical canine-tooth puncture wound “widths”
Mt. Lion
1 1/8” – 1 3/8”
Red Fox
Bite Marks/Kill Evidence on Carcass
• Mt. Lion
• Coyote
• Red fox
• Dog
Bite to top of head or neck, broken neck common
Typically bite throat just behind jaw and below ear. Begin feeding in thoracic area
Throat of kids and lambs; sometimesmultiple bites to back, head & neck. Feed on viscera via entry behind ribs
Indiscriminate mutilation—head, neck, back, rump, etc.
Feral Hogs
1981
Since 1981
Development of the idealHOG for hunting.
Wild hog expansion:
• Illegal introduction for sport hunting
• Dispersal from existing wild populations
• Escapes from hunting preserves
• Escapes from domestic producers
nest
nest
Feeding in picked cornfield
Wallow edge of pond
rooting